Not Enough Items by ChickenBones
Recipe Viewer, Inventory Manager, Item Spawner, Cheats and more.
Waila by ProfMobius
I have the pleasure to introduce to you Waila (What Am I Looking At). Waila is an extension for NEI. It will show in the tooltip what mod an item is from.
BiblioCraft by Joseph 'Nuchaz' Sinclair
BiblioCraft adds fancy storage containers including bookcases, armor stands, potion shelves, regular shelves, tool racks, glass weapon cases, wooden desks and wooden chest labels and now add machines, redstone interactions, and eyeware, fancy lamps and golden lanterns. Also Tables, enchanted plates, map frames, and seats!
Minecraft Multipart Plugin by ChickenBones
Provides multipart versions of some vanilla blocks like torches and buttons.
Carpenter's Blocks by Mineshopper
Adds slopes and a variety of vanilla-inspired blocks that support covers, side covers, overlays, dyes and chiseled patterns.
Chisel adds a huge variety of static blocks to the game. This mod will be very useful for people who like the construction aspect of Minecraft
NEI Plugins by mistaqur
Mod for NEI that reveal some information about Bees/Trees breeding and products. Also adds [?] button support for alternate crafting tables from many mods
Biomes O' Plenty by Forstride, Adubbz, Amnet, ted80
Adds 87 new, unique biomes!
opensource worldgen cosmetic
BiblioWoods Biomes O'Plenty Edition by Joseph 'Nuchaz' Sinclair
Adds support for 16 varietys of wood from Biomes O'Plenty for 8 of the wooden block in BiblioCraft.
Witchery by Emoniph
Extending Minecraft with witchcraft. This mod features: The song, Loved (ft. Mykle Anthony) by wellman. Licensed to the public under http://creativecommons.org/licenses/by-nc/3.0/. Verify at http://ccmixter.org/files/wellman/24289. Sound effects licensed from FreeSFX (http://www.freesfx.co.uk).
Not Enough Keys by Mr_okushama
A very simple mod created to clean up and organize the keybinds gui, organizing mods into their own category and sub menu.
Iron Chest by cpw
New chests with larger sizes, with in-place upgrade items. The feature chest is the crystal chest, which is transparent - some inventory contents are visible without opening the chest
Random Things by Lumien
This mod does what it says...adds random things to minecraft!
random util opensource
ExtraCells by M3gaFr3ak
A Mod that adds 4 new ME Storage Cells and some other cool stuff to AE.
tech addon storage
JABBA by ProfMobius
Jabba (Just Another Better Barrel Attempt) is a storage mod aiming at making a better barrel than what is already out there. It introduces one block (the barrel itself), a set of upgrades and a dolly to move things around.
Ender IO by crazypants
Compact conduits, painted things and access to your stuff through an eye of ender.
An addon to Thaumcraft 4, implementing new content. This mod is a spiritual successor to Elemental Tinkerer. Researches that come from this mod are prefixed by [TT].
ComputerCraft by Daniel Ratcliffe, Aaron Mills
ComputerCraft adds Computers, Programming and Robotics to Minecraft.
SecretRoomsMod by AbrarSyed, alexbegt
This mod adds a variety of cool blocks that camouflage themselves to the surrounding world. All of these blocks have extremely useful functions that allow you to simply hide your diamonds, or punish all who dare try to get to them. Hidden doors, pressure plates, hidden levers and more!